Silver (Luna)

The sign ☽ is one open crescent: a bowed stroke whose cusps never meet and which bears neither diameter nor cross. Scribes made it with a single curve, sometimes doubled for weight, never as Sol's closed disk. Gessmann's Die Geheimsymbole (1899) files Argentum under Luna and shows the bare crescent beside rarer forms with a pellet or a short bar beneath the horns. Newton's papers use a spare right-opening crescent, near astronomical Luna and free of the ticks that mark Monday or quicksilver. It is not ☾ (U+263E), not Mercury's mark, not the flat crescent sometimes given to salt, and not Venus's circle-and-cross. In type the opening faces dexter; closing or reversing the bow reassigns the metal. U+263D fixes the canonical form, while ductus still varies in weight, tilt, and lower-horn length.

Assayers knew silver as a soft white metal, melting at a bright red heat below gold and taking a high polish. Native silver, electrum, acanthite, argentite, and chlorargyrite (horn silver) fed the workshops; much metal was won as a byproduct of lead, copper, and gold work. Cupellation on a bone-ash cupel, under a blast that carries lead off as litharge, leaves a silver button. Parting with aqua fortis, practiced in late medieval mints, dissolves silver and spares gold. The chloride, thrown down by salt, blackens in sunlight, a change noted long before photography. Amalgamation with mercury gathered particles from ores. Silver yields to nitric acid where gold resists, yet it can be left behind when gold is cemented with salt and brick dust. These bench facts, not the emblem alone, fixed Luna as a white, fusible, nitric-soluble body recoverable from lead.

Luna rules the planetary sphere of silver: cold and moist in the Aristotelian quartet, feminine and receptive beside the hot, dry masculinity of Sol. Paracelsian writers set the Moon among celestial governors of metals and of the body, tying lunar influence to the brain, to growth, and to a white watery virtue within salt, sulfur, and mercury. The crescent means increase, reflection, and night; silver returns light without Sol's generative fire. Polarity is strict: gold is king, fixity, and redness; silver is queen, whiteness, and a fusibility that still holds in the cupel. Conjunction of Sol and Luna, drawn as coitus or eclipse, is the chymical marriage in which lunar moisture tempers solar sulfur. The same polarity governs regimen: excess lunar phlegm quenches the work; too little leaves the matter burnt and unripe.

Greco-Egyptian papyri and Zosimos treat silver as a body to be whitened, soldered, and coated by surface films, while parting such deceit from deeper tincture. Arabic authors carried the lunar metal into Latin Geberian texts, where Luna names both the white metal and a stage of the work. Medieval assaying tracts describe cupellation and parting with almost no allegory. Paracelsus kept Argentum as a planetary metal and a medicinal body, dividing vulgar silver from a hidden lunar principle. Michael Maier's Atalanta Fugiens (1618) stages Sol and Luna in pursuit, bath, and conjunction. Basil Valentine's tracts join the Moon to whitening and to antimonial routes toward the white stone. The crescent thus stays both a receipt-mark and a cosmological claim.

In the Magnum Opus silver occupies the albedo, the whitening after nigredo. Once the matter has been calcined or dissolved, washing, imbibition, and gentle heat yield a white earth, a white sulfur, or a lunar body that no longer stains the hand. Authors name this the white stone, luna alba, and the queen who must meet the red king before rubedo. The stage includes purifying vulgar silver, making luna cornea from the chloride, and reducing that horn silver to metal, a white fusible body read as volatility partly fixed. Some use silver as a ferment that receives tincture; others treat philosophical Luna as an inner principle, not coin-metal. Albedo is the bench point at which blackness gives a stable white, ready for solar exaltation.

Eighteenth-century reform stripped planetary names from the elements. Lavoisier's nomenclature and the later systematic tables treated silver as a simple metallic substance, not as Luna. Berzelius's alphabetic symbols gave Ag, from Latin argentum, replacing the crescent in quantitative recipes. Assayers' facts, notably extreme conductivity and reflectivity, native silver, electrum, acanthite, argentite, chlorargyrite, and byproduct recovery from lead, copper, and gold, became properties of element 47. Unicode archives the old mark as U+263D and, in the Alchemical Symbols block that begins at U+1F700, as a dedicated silver character for transcription. Principe treats the archived signs as evidence that chymistry united bench metallurgy with cosmic theory, not as modern chemistry written early.